refact: clean code and update doc

tests/test_routes_classes.py

@@ -179,7 +179,7 @@ class TestClassesRoutes:
         """Test class details route with non-existent class uses repository correctly"""
         with app.app_context():
             with patch('routes.classes.ClassRepository') as mock_repo_class:
-                with patch('flask.abort') as mock_abort:
+                with patch('routes.classes.abort') as mock_abort:
                     mock_repo = MagicMock()
                     mock_repo_class.return_value = mock_repo
                     mock_repo.find_with_full_details.return_value = None